Declension table of ?svāptavacana

Neuter	Singular	Dual	Plural
Nominative	svāptavacanam	svāptavacane	svāptavacanāni
Vocative	svāptavacana	svāptavacane	svāptavacanāni
Accusative	svāptavacanam	svāptavacane	svāptavacanāni
Instrumental	svāptavacanena	svāptavacanābhyām	svāptavacanaiḥ
Dative	svāptavacanāya	svāptavacanābhyām	svāptavacanebhyaḥ
Ablative	svāptavacanāt	svāptavacanābhyām	svāptavacanebhyaḥ
Genitive	svāptavacanasya	svāptavacanayoḥ	svāptavacanānām
Locative	svāptavacane	svāptavacanayoḥ	svāptavacaneṣu

Compound svāptavacana -

Adverb -svāptavacanam -svāptavacanāt